Internal combustion engine



June 0, 1931. w. TAPP 1,812,456

INTERNAL COMBUSTION ENGINE Filed Aug. 28,1929

[nvenibr gmm A iiorncy Patented June 30, 1931 UNITED STATES PATENT OFFICE WILLIAM C. TAPP, OF LOUISVILLE, KENTUCKY, ASSIGNOR OF ONE-HALF T ROBERT N.

- HART, OF LOUISVILLE, KENTUCKY INTERNAL COMBUSTION ENGINE Application filed August'28, 1929. Serial No. 389,009.

The present invention relates to improvements in engines of the internal combustion type and more particularly to those of the two-cycle variety.

The principalobject of this invention is to provide a drive shaft with a built-in fuel intake valve capable of opening and closing accurately at predetermined positions of the piston.

Another important object of the invention is to -provide fuel intake means for twocycle engines whereby the necessity of creating a powerful suction to suck in the fuel can be eliminated in favor of a steady full stroke intake.

Still another object of importance is to provide a fuel intake including means for deflecting the usual lubricant contained fuel against the connecting rod bearing.

Various other important objects and advantages of the invention will become more apparent as the description proceeds in detail hereinafter.

In the drawings:

Figure 1 represents a fragmentary elevational View of the engine showing the intake manifold and its connection to the carbureter.

Figure 2 represents a fragmentary cross sectional view through one of the valve structures disclosing the ports in partial registry.

Figure 3 is a fragmentary vertical sectional view.

Figure 4 is a cross sectional view of the crank shaft looking toward one of the fuel deflecting devices. 7

Figure 5 is a side elevation showing one of the drive shaft bearings detached from the engine.

Referring to the drawings, wherein like numerals designate like parts, it will be seen that the numeral 5 denotes the crank case from which the pair of cylinders 6-6 project from diametrically opposite points, the same being secured to the crank case in a manner well known in the art and in a manner forming no part of this invention.

Numeral 7 denotes the intake by-pass in the wall of each cylinder 6, while 8 denotes the usual exhaust pipe which communicates with port 9 in the wall of each cylinder. Each cylinder is also provided with a water jacket 10 and the openings 11 communicate with the water compartment and permit pipe connections whereby the water compartments may be interposed in a cooling system.

Operable within each cylinder 6 is a piston 12 having a connecting rod 13 connected in the usual manner thereto. The inner end of each connecting rod 13 has the usual halfbearing structure 14c thereon equipped in such a manner as to permit the attachment thereto of'the separable half section 15 by means of bolts 16.

The invention resides in the provision of a drive shaft which is denoted by 17. This drive shaft has a pair of oppositely directed cranks 1818 operable within the crank case 5 and to which the connecting rod bearing sections are secured in the manner as shown in Figure 3.

The portions of the drive shaft 17 projecting beyond the cranks 18-18 extend through the opposed walls of the crank case 5 and through the novel bearing structures generally referred to by numeral 19 in Figure 5. Each of these bearing structures includes a tubular body 20 having a fiat elongated plate 21 secured transversely thereon and being provided at each end with an opening 22 for receiving means '23 whereby the body 20 may be secured to the usual web structure 24: on the crank case 5. The body 20 has an opening 25 extending for a substantial distance circumferentially thereof and is in registry with the rectangular shaped opening 26 in the plate 21.

An opening 27 is provided in the web 2 L coincident with the opening 26, while at the opposite side of the web 24 the intake manifold 28 is secured in any known manner. The intake manifold 28 has an inlet 29 connected as at 30 to the usual carbureter 31.

Secured within the body 20 is the bushing 32, preferably of some suitable wear-resisting material. .This bushing is stationarily retained within the body 20 by means of the set-screw 33 and within the bushing 32 is rotatably disposed the drive shaft 17 At the point where the drive shaft merges with the cranks 1818, alined openings 34 extend inwardly within the confines of the bodies 20. As is clearly shown in Figure 2, these portions of the drive shaft are each pro-' vided with a circumferentially extending slot registrable with the opening 36 in the bushing 32. By looseningthe set screw 83, the bushing 32 maybe rotated so as to limit the opening therein with respect to the body opening25, and in thismanner the admission of the fuel from the manifold 28 through the opening 24 of the drive shaft may be advanced or retarded as desired. 7

In two-cycle engines of the type shown in the drawings, lubricant is mixed with the fuel and serves to lubricate the bearings of the connecting rod when injected into the crank shaft. Toassure' an efficient lubrication of the connecting rod bearings, deflecting devices such as are generally referred to by numeral 37 in Figure 4 are mounted on the drive shaft in the manner clearly shown in Figure 3 v The ends of the'bores 34. opening into the crank case 5 each receive one of these deflectors, each of which includes a collar 38 for snug fit within the bore 34 and a flange 39' for engaging the inner end of the corresponding portion of the drive shaft. Extending obliquely from the collar 38 is the deflecting plate 40', connected to the collar by theside walls 41. These deflectorsare positioned in a-manner whereby the incoming fuel will be deflected in the direction of the connecting rod bearings, so that the lubricant content thereof will reach the bearmeans, the bearings may be maintained lubricated 1n a more'eflicient manner than could be attained heretofore.

It is also to be noted, that a novel fea- Having described the invention, What is claimed as new is: 7

1. In an internal combustion engine comprising a bearing, a hollow drive shaft disposed through the bearing, said bearing being provided with an opening, a supply pipe secured to the bearing over the sald openmg,

and being communicable with the said drive shaft, and means on the said drive shaft whereby the fluid delivered therethrough may be deflected in a predetermined direction, said means comprising a collar, a flange on the collar for engaging the adjacent end of the drive shaft, and an obliquely disposed construction on the collar from which the fluid is deflected.

-2. In an internal combustion engine, a drive shaft consisting'of journal portions connected by oppositely disposed crank portions, said journal portions having axial chambers opening outwardly of their respective inner ends, each of said axial chambers having an inletend for the admission of lubricant mixed with fuel, connecting rod bearings on said crank portions, and a deflecting member fixed on each journal portion of the shaft adjacent the outlet end of the axial chamberand inclined in the direction of the adjacent crank portion of the shaft for directing the mixture against the. connecting rod bearing.

In testimony whereof I aflix my signature.

7 WILLIAM C. TAPP.

ture of this invention also resides in-the fact i that the gas in coming through the crank shaft valve creates a new coolinggsystem and I prevents main bearlngs from overheating.

Likewise, the deflector deflects the coolmixe ture of oil and Water and produces a cooling effect on the connecting rods and Wrist pins. While the foregoing description sets forth the invention in detail, it is to be understood that various changes in the shape, size, and materials may be made in the manufacture of this novel engine construction without departing from the spirit and scope of the invention as claimed hereinafter. 

